1983

263x units are built between 1983 and 1990.  

Sources: https://fr.wikipedia.org/wiki/VU_IV?oldformat=true

1984

Between 1984 and 1986, 6x B 21-73 coaches are transformed into B 84-73 "Family" coaches.  

Concerns registration number(s): 50 85 21-73 107-7, 50 85 21-73 110-1, 50 85 21-73 190-3, 50 85 21-73 191-1, 50 85 21-73 192-9, 50 85 21-73 193-7

Sources: https://fr.wikipedia.org/wiki/B_50_85_21-

1984

Unit B 21-73 114 is transformed into unit Salon 89-73 000 in 1984.  

Concerns registration number(s): 50 85 21-73 114-3

Sources: https://www.ferrovie.it/forum/viewtopic.php?f=43&t=25822&start=840

1987

January

Unit B 21-73 121-8 is discarded after a collision in Osogna.  

Concerns registration number(s): 50 85 21-73 121-8

Sources: http://www.juergs.ch/bahn/vorbild/sbb/ewivb.html

1992

May

Unit B 21-73 199-4 is transformed into unit X 99-90 108 in 1992.  

Sources: http://www.juergs.ch/bahn/vorbild/sbb/ewivb.html

1992

December

Unit B 21-73 203-4 is discarded after an accident in Oerlikon.  

Sources: http://www.juergs.ch/bahn/vorbild/sbb/ewivb.html

1995

From 1995, these units are upgraded for push-pull trains and are designated as B 21-75.  

Sources: https://wikimonde.com/article/SBB_A_50_85_10-

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Latest update on the 10th of August 2022 at 20:15

Contributor(s): Tudor C.

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